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塔里木盆地天然气中氮地球化学特征与成因
刘全有 戴金星 刘文汇 秦胜飞 张殿伟
摘 要:通过统计分析塔里木盆地103个天然气样品,发现塔里木盆地天然气主要存在两种成因类型,即油型气和煤成气,且氮气含量在油型气中明显高于煤成气.在台盆区产自古生界地层的塔中、东河塘、哈得和中生界的轮南地区为异常高氮气天然气,氮气含量大于20%;新生界地层与塔西南和库车坳陷的中生界地层产出的天然气氮气含量最低(《5%),主要为煤成气;塔北地区,天然气氮气含量变化较大,低含量氮气主要为煤成气,而高氮气含量天然气为油型气,在高氮气含量的油型气中,不同热演化阶段氮气来源不同,其含量也不相同.雅克拉天然气高氮气含量可能是来源于高演化形成的氮气与少量深部气体的混合.
关键词:天然气;氮气;地球化学;成因类型;塔里木盆地
分类号:TE122.2 文献标识码:A
文章编号:0253-9985(2007)01-0012-06
Geochemical characteristics and genesis of nitrogen in natural gas from Tarim Basin
Liu Quanyou Dai Jinxing Liu Wenhui Qin Shengfei Zhang Dianwei
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刘全有(1975-),男,博士后,天然气地质与油气地球化学
作者单位:刘全有(中国石油天然气股份有限公司,勘探开发研究院,北京,100083)
戴金星(中国石油天然气股份有限公司,勘探开发研究院,北京,100083)
刘文汇(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
秦胜飞(中国石油天然气股份有限公司,勘探开发研究院,北京,100083)
张殿伟(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
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